JPH054636A - Disc cartridge housing case and manufacture thereof - Google Patents

Abstract

PURPOSE:To improve the efficiency and reliability of numbering by a method wherein in a disc cartridge housing case having a printing layer on the surface, variable information is formed by locally erasing the printing layer by radiation of laser rays. CONSTITUTION:In a disc cartridge housing case 10 having on the surface a printing layer containing invariable information which is never changed and variable information which is changed according to needs, the variable information is formed by locally erasing the printing layer by radiation of laser rays. In this method, as the printing layer containing the invariable information is locally erased by utilizing laser rays which apply the variable information and traces of the laser rays are made to remain there permanently, conventional inconveniences such as displacement in numbering, wrong attachment of stamps in stamping and wear due to careless handling can be avoided without fail.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a storage case for, for example, a magnetic disk cartridge and a method of manufacturing the storage case.

[0002]

2. Description of the Related Art A conventional storage case for a disk cartridge is made of cardboard and is composed of two separable halves, a main body having a trademark or a design printed on its surface and a lid. Therefore, all information such as trademarks, designs, and cautions printed on the storage case is fixed regardless of the manufacturing lot, and because of its aesthetic appearance, the storage case is generally surface-polished. It has been processed.

[0003]

When shipping information with manufacturing information stored in such a storage case, conventionally, variable information such as a manufacturing lot number is used to distinguish manufacturing lots and imitation products. I used to stamp. However, as mentioned above, the surface of the storage case is polished, so the position of the stamp is misaligned, it takes time to dry the stamping, and sometimes it is inadvertently attached to other parts, There was the inconvenience of reducing the product value. Further, due to rough handling during use, the ink may become faint and unreadable.

The present invention has been made in view of the above-mentioned circumstances, and an object thereof is to eliminate the above-mentioned inconvenience and to improve the efficiency and reliability of the numbering process, and a storage case for a disk cartridge. It is to provide the manufacturing method.

[0005]

In order to achieve this object, the present invention provides a storage case for a disk cartridge having a print layer on its surface, which contains fixed information that does not change and variable information that changes as necessary. In the above, the variable information is formed by locally dissipating the printed layer by irradiation of laser light. Similarly, in the method for producing a storage case for a disk cartridge which gives variable information to be changed as necessary to the printed layer on the surface of the storage case for a disk cartridge containing fixed information which does not change, the printing layer And a step of irradiating the positioned surface with a laser beam to locally dissipate only the printing layer,
Thus, the traces of the dissipated print layer show the variable information.

[0006]

The printing layer on the surface of the storage case, which has been polished, is irradiated with laser light in a pattern corresponding to variable information consisting of numbers and / or alphabets so that the printing layer is locally dissipated. .

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below in detail with reference to the drawings. In FIG. 1, reference numeral 10 is a cardboard cardboard storage box in which cardboard is used as a base material, a disk cartridge is housed therein, and fixed information such as a trademark, design and caution is printed on the surface in a desired color. A case, that is, a perspective view of an object to be printed, which is composed of two halves of a separable lid 11 and a main body 12. The variable information such as the manufacturing lot number is preferably provided in a less conspicuous place, for example, anywhere on the bottom surface 13.

FIG. 2 is an enlarged cross-sectional view in which the object 10 to be printed is partially broken, and shows a white thick paper 14 as a base material and a black printing layer 1 printed on the surface thereof, for example.
It consists of 5. As will be described later in detail, the variable information is given to the print layer 15 by the irradiation of the laser beam.

Referring now to FIG. 3, there is schematically shown the situation in which a suitable laser unit 30 is used to laser machine a manufacturing lot number on a portion of the bottom surface 13 of the object 10 to be printed. The object to be printed 10 is placed on the work table 21 with the bottom surface 13 facing upward, that is, facing the laser unit 30. The laser unit 30 includes a laser initial oscillation device 31, a beam compressor assembly 32, a reflecting mirror assembly 33, a delivery tube 34, an auto code disk unit 35, and a condenser lens assembly 36.
In particular, the auto code disc unit 35 is capable of performing 5-digit numbering on the printing object 10 by combining it with a control device (not shown) for simplification.

In operation, the print substrate 10 is first positioned in relation to the laser unit 30 by a plurality of position sensors (not shown). Laser unit 30
Is driven in response to the completion of the above-described positioning, and a laser beam is irradiated to a predetermined position on the bottom surface 13 of the object to be printed 10 according to a pattern corresponding to a 5-digit manufacturing lot number.

FIG. 4 is a partially enlarged cross-sectional view of the object to be printed 10 taken along the line 1-1 in FIG. 3, particularly after being irradiated with laser light. The printing layer 15 in the portion irradiated with the laser light is dissipated to form the void 16, and the white paper is exposed.

FIG. 5 is a plan view showing the manufacturing lot number of the printing layer 15 of the object to be printed 10 after laser processing in substantially actual size. The laser irradiation energy used is the material and thickness of the printing layer 15. It is decided in advance in consideration of such factors. Laser unit 30 in this embodiment
Is a pulsed carbon gas TEA laser.
Output wavelength of 0.6 μm, 17 mm (height) x 19 mm
(Width) beam shape, marking area up to 100 mm ² , pulse duration up to 1 μs, 2.0 j to 0.2
The output energy of 5j is its specification.

While the present invention has been described in terms of one preferred embodiment, those skilled in the art will be able to make numerous changes and modifications without departing from the spirit and scope of the invention. For example, the surface configuration of the print-receiving material 10 is not limited to that shown in FIG. 2, and as shown in FIG. 6, a transparent plastic film 17 is laminated on the printed layer 15 for packaging. It can be a film.

After packaging the product with such a packaging film, it is also possible to write variable information by irradiating the printing layer with laser light from the outside of the transparent plastic film 17. In this way, it can be used to distinguish between an imitation product using the imitation packaging film and an authentic product. Further, in the above-described embodiment, the background color of the thick paper 14 is white and the printing layer 15 is black. However, the combination of the colorings is not limited, and any combination may be used.

Further, for example, as shown in FIGS. 7, 8 and 9, the printing layer 15 is composed of a blue layer 15a, a red layer 15b and a yellow layer 1.
5c three-layer structure, depending on the intensity of the laser beam,
It is possible to adjust the marking (printing) on the multilayer printing surface. For example,
When the laser light is weak, as shown in FIG. 7, the blue layer 15a
The variable information is red because only the void 16 is exposed and the second red layer is exposed. Similarly, when the laser light amount is in the middle, the variable information is yellow as shown in FIG.
Further, when the laser light is strong, the variable information becomes white because the base paper 14 is exposed as described above.

[0016]

As described in detail above, the present invention utilizes laser light to apply variable information to locally dissipate a printed layer containing fixed information and to permanently leave the trace. Therefore, it is possible to completely avoid inconveniences such as the positional deviation in the conventional numbering process, the sticking of the stamping to another place, and the disappearance due to rough handling. Also, when the laser light passes through the transparent packaging film and irradiates the printing layer, variable information can be printed in a completed state after all processing operations such as shrink-link packaging have been completed, resulting in defects in the final finishing process. When it occurs, there is no need for rework (reprinting),
Prevents imitation. Further, when the printing layers are composed of a plurality of layers of different colors, the variable information can be printed in different colors by increasing and decreasing the laser light, and the added value of the product can be increased.

[Brief description of drawings]

FIG. 1 is a perspective view of a storage case for a disk cartridge according to the present invention.

FIG. 2 is a partially cutaway sectional view of a base material forming a storage case.

FIG. 3 is a perspective view of the entire system for irradiating the surface of the storage case with laser light to give variable information.

4 is a cross-sectional view taken along line 1-1 of FIG. 3, showing a state particularly after laser irradiation.

FIG. 5 is a diagram showing manufacturing lot numbers as variable information of substantially actual size given by laser irradiation.

FIG. 6 is a partially cutaway sectional view of a base material of a storage case according to another embodiment.

FIG. 7 is a diagram showing a print layer having a three-layer structure.

FIG. 8 is a diagram showing a print layer having a three-layer structure.

FIG. 9 is a diagram showing a print layer having a three-layer structure.

[Explanation of symbols]

10 Storage case as print object 11 lid 12 body 14 Base paper as base material 15 printing layers 16 vacant places 30 laser unit

Claims (4)

[Claims] 1. A storage case for a disk cartridge which has a print layer on its surface, which includes fixed information which does not change and variable information which is changed as necessary, wherein the variable information is
A storage case for a disk cartridge which is formed by locally dissipating the printed layer by irradiation with laser light. 2. A method for manufacturing a storage case for a disk cartridge, wherein variable information that is changed as necessary is added to a print layer on the surface of the storage case for a disk cartridge containing unchanged fixed information. And a step of irradiating the positioned surface with a laser beam to locally dissipate only the printed layer, whereby the trace of the dissipated printed layer is the variable information. The method for manufacturing a storage case for a disk cartridge, which is characterized in that 3. The disk cartridge according to claim 2, wherein the printed layer is irradiated with laser light through a transparent packaging film that covers the outer surface of the storage case for the disk cartridge. Manufacturing method for storage case. 4. The storage case for a disk cartridge according to claim 2, wherein a plurality of printing layers having different colors are prepared, and the printing color of the variable information is made variable depending on the intensity of laser light. Manufacturing method.